<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>

<body>

  <!-- js的引入  
    src="js的文件路径"
    相对路径 ./js/index.js 
    绝对路径 https://misc.360buyimg.com/??jdf/lib/jquery-1.6.4.js
  -->
  <script src="./js/index.js"></script>
  <script
    src="https://misc.360buyimg.com/??jdf/lib/jquery-1.6.4.js,mtd/pc/common/js/o2_ua.js,mtd/pc/base/1.0.0/event.js"></script>
</body>

</html>